L-Jet TPS is all oily, the bottom of the Throttle Body etc.... |
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L-Jet TPS is all oily, the bottom of the Throttle Body etc.... |
malcolm2 |
Oct 3 2016, 08:43 PM
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#1
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Advanced Member Group: Members Posts: 2,747 Joined: 31-May 11 From: Nashville Member No.: 13,139 Region Association: South East States |
Taking the TB off to be rebuilt and could not help but notice that the under side is covered with oily dirt. 20,000 miles since I put it all together, but this area has, by far, the worst build up.
The boot seems pretty stiff but no obvious cracks of holes. 1. I assume the oil is coming from the oil tower filler neck. But why would it blow out with air sucking in? 1st thought the stiff boot did not make a good seal and this is my vacuum leak. But again shouldn't it suck in? But the btm clamp screw on the boot was very tight. 2. is this normal? 3. are the "S" boots available new? |
ClayPerrine |
Oct 5 2016, 01:06 PM
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#2
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Life's been good to me so far..... Group: Admin Posts: 15,514 Joined: 11-September 03 From: Hurst, TX. Member No.: 1,143 Region Association: NineFourteenerVille |
The L-Jet system does NOT use a PCV valve. It pulls air in from the oil filler neck to the intake tube. If you have a bad cap seal, you will have a lean running condition on your engine.
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malcolm2 |
Oct 5 2016, 01:42 PM
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#3
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Advanced Member Group: Members Posts: 2,747 Joined: 31-May 11 From: Nashville Member No.: 13,139 Region Association: South East States |
The L-Jet system does NOT use a PCV valve. It pulls air in from the oil filler neck to the intake tube. If you have a bad cap seal, you will have a lean running condition on your engine. The only current issue is the oily build up that accumulated on and under the TPS which is below the seam of the intake boot and the inlet of the throttle body. Since there is no PCV, I believe that the boot is not sealed against the TB as well as it could be. The boot seems stiff. short of buying (even finding) a new one, I think I will try to find a cushy band to put between the boot and the TB. Anyone ever tried to "soften" these old rubber parts? I have seen some photos were folks use sealant of some sort, but I am staying away from that idea. |
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